Adjustable support arm



FIG. 1 is a perspective view of adjustable support arm showing mydesign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view hereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view from bottom.

The ornamental design for an adjustable support arm, as shown anddescribed.